/* roulang page: index */
:root {
      --primary: #1A1D29;
      --accent-green: #2B8C5E;
      --warm-bg: #F5F0E8;
      --gold: #D4A853;
      --text-title: #1A1D29;
      --text-body: #3A3D47;
      --text-muted: #6B6E78;
      --card-bg: #FFFFFF;
      --dark-bg: #10121A;
      --white: #FFFFFF;
      --border-light: rgba(0,0,0,0.04);
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-cta: 30px;
      --transition: all 0.2s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--warm-bg);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      scroll-behavior: smooth;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3 {
      font-weight: 700;
      color: var(--text-title);
    }
    h1 {
      font-size: 42px;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 28px;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 20px;
      class="line-height: 1.4;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--accent-green);
      color: white;
    }
    .btn-primary:hover {
      background-color: #237A4E;
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      color: var(--accent-green);
      border: 1px solid var(--accent-green);
    }
    .btn-outline:hover {
      background-color: rgba(43,140,94,0.1);
      transform: translateY(-1px);
    }
    .btn-gold {
      background-color: var(--gold);
      color: #1A1D29;
      border-radius: var(--radius-cta);
      padding: 14px 32px;
      font-weight: 700;
      box-shadow: 0 4px 10px rgba(212,168,83,0.3);
    }
    .btn-gold:hover {
      background-color: #c49a3e;
      transform: translateY(-2px);
    }
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(26,29,41,0.92);
      backdrop-filter: blur(12px);
      z-index: 1000;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      color: var(--accent-green);
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-menu a {
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 15px;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: white;
      border-bottom-color: var(--accent-green);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }
    .hamburger span {
      width: 25px;
      height: 2px;
      background: white;
      display: block;
      transition: var(--transition);
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 68px;
      left: 0;
      width: 100%;
      background: rgba(16,18,26,0.98);
      backdrop-filter: blur(20px);
      padding: 24px;
      flex-direction: column;
      gap: 16px;
      z-index: 999;
    }
    .mobile-menu a {
      color: rgba(255,255,255,0.8);
      font-size: 18px;
      padiding: 10px;
border-left: 3px solid var(--accent-green);
      padding-left: 16px;
    }
    section {
      padding: 80px 0;
    }
    .hero {
      display: flex;
      align-items: center;
      gap: 48px;
      min-height: 90vh;
      padding-top: 120px;
    }
    .hero-left {
      flex: 0 0 55%;
    }
    .hero-right {
      flex: 0 0 45%;
    }
    .hero-right img {
      width: 100%;
      border-radius: 16px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.15);
      object-fit: cover;
      aspect-ratio: 4/3;
    }
    .hero h1 {
      margin-bottom: 20px;
    }
    .hero p {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 90%;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }
    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 20px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .feature-icon {
      font-size: 36px;
      color: var(--accent-green);
      margin-bottom: 16px;
    }
    .waterfall {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .match-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      display: flex;
      transition: var(--transition);
    }
    .match-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .match-img {
      flex: 0 0 40%;
      background-size: cover;
      background-position: center;
      min-height: 180px;
    }
    .match-content {
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .comparison-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-top: 28px;
    }
    .compare-card {
      background: #fdfdf9;
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border-left: 6px solid var(--accent-green);
    }
    .compare-card h3 {
      margin-bottom: 16px;
    }
    .stats-reviews {
      display: flex;
      flex-wrap: wrap;
      gap: 32px;
      align-items: center;
      margin-top: 24px;
    }
    .stat-item {
      flex: 1 1 160px;
      text-align: center;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--gold);
      font-family: 'Inter', sans-serif;
    }
    .review-slider {
      display: flex;
      gap: 20px;
      overflow-x: auto;
      margin-top: 24px;
      padding-bottom: 12px;
    }
    .review-card {
      min-width: 280px;
      background: var(--card-bg);
      padding: 20px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
    }
    .faq-section {
      background: var(--dark-bg);
      color: white;
    }
    .faq-section h2, .faq-section .faq-title {
      color: white;
    }
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      margin-bottom: 8px;
    }
    .faq-question {
      width: 100%;
      background: transparent;
      border: none;
      color: white;
      font-size: 18px;
      font-weight: 600;
      padding: 20px 0;
      text-align: left;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #e0e0e0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #bbb;
      padding-bottom: 0;
    }
    .faq-answer.open {
      max-height: 200px;
      padding-bottom: 16px;
    }
    .cta-banner {
      background: linear-gradient(135deg, #1A1D29 0%, #2B8C5E 100%);
      border-radius: 28px;
      padding: 64px 40px;
      text-align: center;
      color: white;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      color: rgba(255,255,255,0.7);
    }
    footer {
      background: var(--dark-bg);
      padding: 48px 0 24px;
      color: white;
    }
    @media (max-width: 1024px) {
      h1 { font-size: 36px; }
      .waterfall { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero { flex-direction: column; gap: 32px; }
      .hero-left, .hero-right { flex: 1 1 100%; }
      .grid-3 { grid-template-columns: 1fr; }
      .comparison-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      h1 { font-size: 32px; }
      h2 { font-size: 24px; }
      .match-card { flex-direction: column; }
      .match-img { height: 180px; flex: none; }
    }